Iowa restricts nonresident deer licenses to a draw organized by zone, with 6,000 general licenses across 10 zones in 2026 and awards based on preference points. Deer pay no attention to the brochure. During the 2024 season, one northeastern county recorded a harvest sixty-six times the total in the western county with the lowest count. For practical purposes, the harvest reports show two different Iowas: northeastern timber and river country with high reported counts, and northwestern corn and soybean country with low reported counts. This paper examines where the deer actually are.
KEY FINDINGS
- Iowa's highest reported county deer harvest in 2024 came from Clayton, 4,318, which recorded 66× as many deer as the lowest county, Calhoun, 65. Iowa had the second-largest spread among the seven states with 2024 county harvest data in our database (Illinois 110×, Iowa 66×, Wisconsin 65×, Michigan 59×, Missouri 27×, Indiana 19×, Ohio 15×). This Iowa comparison uses county totals without adjusting for county size.
- Northeastern driftless terrain holds five counties among Iowa's leading six: Clayton with 4,318; Allamakee with 3,598; Winneshiek with 2,549; Dubuque with 2,480; Jackson with 2,445. Their Mississippi landscape includes wooded ground, bluffs, and river bottoms. The lone exception is south-central Madison (2,552), which ranks third in Iowa.
- The driftless northeast grouping contains a dozen counties, or 12% of Iowa's counties. It supplied 24.9% of Iowa's total harvest for 2024, with a county average of 2,104 deer.
- For the sixteen counties grouped as the row-crop northwest, the harvest share was only 3.3%. Their county average of 211 deer was a tenth of the northeastern average.
IONE REPUTATION, TWO STATES
A statewide reputation, with different county harvest counts
Across the country, Iowa carries a whitetail reputation that treats the state as a whole. Nonresident hunters request a particular hunting zone and season there. Harvest reports show a more uneven picture. Across the state's 99 counties, wooded northeastern counties record higher totals, while the crop-heavy northwest records lower ones. By themselves, these figures neither establish how many deer live there nor explain the gap. The extremes during 2024 show the difference clearly: Clayton County recorded 4,318 deer; the Calhoun County count was 65. That is a 66-fold difference separating the highest county count from the lowest, within one state during one year.
IITHE DRIFTLESS NORTHEAST
Woodlands, bluffs, and rivers hold the high harvest counts
The leading counties fall together in a single region. Clayton, Allamakee, Winneshiek, Dubuque, and Jackson connect along the Mississippi in Iowa's northeastern corner. Their terrain belongs to Iowa's Driftless Area: unglaciated land with steep, wooded bluffs, spring-fed valleys, and river bottoms that the last ice sheet passed by. This country is a poor fit for large-scale row crops and prime ground for deer. Hardwood woods and river corridors give deer hiding cover and paths to follow close to farm-grown food. Iowa counties with greater forest cover register more deer per square mile (rank correlation +0.92 across 99 counties, 2020 to 2024). The northeast held on to the most cover. Iowa's cover lasted there.
The concentration shows up in the harvest numbers. Twelve counties in the driftless and near-driftless northeast (Allamakee, Clayton, Winneshiek, Fayette, Howard, Chickasaw, Dubuque, Delaware, Jackson, Jones, Clinton, and Buchanan) contributed 24.9% of the state's full 2024 harvest, although they represent only about an eighth of Iowa's counties. The average was 2,104 deer for each county. No other county block registered more deer than these twelve, which contributed 24.9% of the state's harvest. Iowa counties with less land in corn and soybeans register more deer per square mile (rank correlation -0.90 across 99 counties).
Twelve counties in northeastern Iowa, one-eighth of the state's counties, contribute a quarter of Iowa's reported deer harvest. Some hills there were left too steep for farming by the last ice sheet.
IIITHE ROW-CROP DESERT
Cornfields without a break
The lowest-ranked counties also fall within one region, where timber and river cover are thinner than in the northeast. Calhoun, Ida, Osceola, Buena Vista, Pocahontas, Sioux, and nearby counties occupy the flat northwest. Most of the ground in each county grows corn or soybeans. That farming productivity creates trouble for deer. Corn and soybean fields running together, with little standing timber, few wetlands that remain undrained, and scant cover beside rivers, supply food but almost no security. Sixteen northwestern counties (Lyon, Osceola, Sioux, O'Brien, Clay, Dickinson, Plymouth, Cherokee, Buena Vista, Ida, Sac, Calhoun, Pocahontas, Palo Alto, Emmet, and Kossuth) accounted for only 3.3% of the state's 2024 harvest. Their average was 211 deer for each county, one-tenth of the northeast block's per-county harvest. Small harvest totals, taken alone, cannot establish how abundant deer are or single out cover as the reason.
IVHABITAT, NOT VIRTUE
How to read Iowa's regional split
A low deer harvest in a northwest Iowa county tells you little about the way people manage its land. Habitat and hunter numbers explain most of that total. Iowa counties with greater corn and soybean coverage generally report fewer harvested deer per square mile (rank correlation -0.90 across 99 counties, 2020 to 2024). The ‘two Iowas’ pattern names a gap in reported harvest between the wooded northeast and the heavily farmed northwest. Those totals cannot show, on their own, what causes the gap. Compass direction alone is too simple a way to read the pattern. Another, less prominent pocket of timber follows the rivers through south-central Iowa: Madison County recorded a harvest of 2,552 deer in 2024, the third-highest total in the state, far from the northeast. That does not make the northeast good and the rest of Iowa bad. Wherever woods and rivers occur, that habitat beats unbroken cornfields. Iowa's timber and river habitat clusters in the northeastern part of the state.
VREADING IOWA HONESTLY
Where your zone license lets you hunt
Planning a possible Iowa hunt for 2026 still means selecting both a county and a property inside your zone. The general deer license for nonresidents applies solely to the hunting zone and season awarded in the draw. Your application’s zone selection fixes the part of Iowa where you may use that tag. County harvest counts, however, cannot establish how many deer occupy a particular property. Reported totals are high in the northeastern driftless country. We think the wooded south-central counties merit further attention. The crop-dominated northwest records lower totals. Our approach is to compare county and property cover on the map inside your selected zone.
NOTES AND SOURCES
- The county totals reproduce reported deer harvest for the 2024 season from the consolidated deer database (harvest_county_year table, Iowa records; 99 counties, state total 101,216). The 66× difference comes from dividing Clayton's total (4,318) by Calhoun's (65).
- We set the regional groupings for this analysis. The northeastern Driftless group includes Buchanan, Clinton, Jones, Jackson, Delaware, Dubuque, Chickasaw, Howard, Fayette, Winneshiek, Clayton, Allamakee: 12 counties, totaling 25,244 deer, contributing 24.9% statewide, and averaging 2,104. The northwestern row-crop group includes Kossuth, Emmet, Palo Alto, Pocahontas, Calhoun, Sac, Ida, Buena Vista, Cherokee, Plymouth, Dickinson, Clay, O'Brien, Sioux, Osceola, Lyon: 16 counties, totaling 3,369 deer, contributing 3.3% statewide, and averaging 211.
- Glaciers did not cover the Driftless Area of northeastern Iowa or its neighboring parts of Wisconsin, Minnesota, and Illinois. Steep slopes, hardwood woods, and valleys cut by rivers define this landscape. That habitat supports denser deer populations than the glaciated cropland around it.
- Read this paper alongside the Iowa county overview for a look at geography within the state. Its focus is where Iowa's harvest occurs, rather than how the state ranks against others.
- Limits of the data: deer numbers, hunter access, county size, and license allocation all affect reported harvest. Deer abundance alone does not determine it. These counts indicate where hunters take deer; they are not a direct census of how densely deer occupy the land. A county's borders make no distinction between publicly and privately owned land.
Fully Drawn Research is an independent data analysis desk, not affiliated with any state wildlife agency, transportation agency, mapping provider or outfitter. Harvest figures are Iowa Department of Natural Resources public records, analyzed independently by FDR. Regional groupings are FDR analytical constructs, not official state regions. Reported harvest is an index influenced by county area, access, and tag supply as well as deer abundance. Figures current to the 2024 season. FDR is an independent data analysis desk, not affiliated with any state wildlife agency.
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